engine codes????

hi all hope you can help me im new to all this. i have a skoda fabia 1.4 16v 100hp engine code AUB.

the first problam i have is my power steering no longer works that must be the power steering pump yeh?? the secound i had was why at work my doors unlocked them self, the windows droped and i could not make this stop so i just took the lead off the battery because of where the car was etc. put the lead back on and the car would not tick over. got the car home took the fuse out for the moment so the windows would stay up till i could get it sorted, i took the fuse out for the central locking.

took the lead back off the battery again and put it back on the car seemed bit better would tick over but now runs lumpy at low RPM.

got my self an engine code reader, the codes where

18020, 17559, 16786, 17566.

i under stand from reading your site that code 18020 is an ECU problam?? and there is a code you can put in to reset this??? 00071?? how do you do this where do you put the code in and how.

the next is code 17559 i understand this to be somthink to do with air flow or air leaks??

any help on any of my problams would help me a grate deal as ive just had a baby with my girlfriend and we are trying to save money. i cant aford to got to the skoda dealers just dont have the money.

help please mike